Limitations of batteries and drive components, safety issues, and injuries caused by the toy itself.
1. Limitations of batteries and drive devices: Most batteries and drive devices used by water guns on the market do not support voltage inputs above 11.1V. If too high a voltage is used, it may damage the circuit.
2. Safety issues: High voltage input above 11.1V will cause greater wear of internal components, increase heat, and even cause safety hazards such as fire.
3. Finally, damage to the toy itself: In some cases, if a high voltage above 11.1V is used, it is easy to cause mechanical damage to the toy itself or burn parts, thereby affecting its proper operation and longevity.
The battery may be broken.
Listen,yours should be a lithium battery. Although lithium batteries have large capacity, their shortcomings are also obvious, that is, they are easy to break after long-term storage.
If it has been stored for more than a few months and not used, and now you find that it cannot be charged when you recharge it, then the battery is probably broken.
In this case, simply change the battery.